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Dual-Layer Medical Balloon

a balloon and dilatation technology, applied in the field of balloons, can solve the problems of limiting the applicability of balloons as bio-compatible materials, exhibiting less flexibility and trackability than desired, and high burst strength of balloons made from high-strength polymers

Inactive Publication Date: 2007-06-21
MEDTRONIC VASCULAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0009] In another embodiment, the present invention relates to a process for forming a dual-layer dilatation balloon. The process comprises forming a dual-layer extrudate having an outer layer including a polyamide and an inner layer including a polymer selected from the group consisting of a polyester, polyether, polyamide and copolymers thereof, and forming the dual-layer balloon from the dual-layer extrudate in a ballo...

Problems solved by technology

Balloons made from high strength polymers, while exhibiting high burst strengths, exhibit less flexibility and trackability than desired.
However, the use of plasticizer can limit the balloons applicability as a bio-compatible material.

Method used

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Examples

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Embodiment Construction

[0020] It is desirable to improve the flexibility and trackability of dilatation balloons while maintaining a high degree of strength in the balloon. Preferably, these improvements are made while limiting the use of plasticizers, which can migrate out of the balloon. Improved flexibility and trackability would allow a surgeon to maneuver the balloon, and alternatively, a balloon and stent, through very small diameter vasculature that may have a large degree of blockage or plaque build-up. The high degree of strength provides the surgeon with maximum flexibility to inflate the balloon, and alternatively to deliver a stent upon inflation, without bursting the balloon. In order to improve the flexibility of standard balloons without the use of plasticizers, or alternatively, with the limited use of plasticizers, a softer and more flexible material is co-extruded with a high-strength material to form a dual-layer balloon.

[0021] A balloon dilatation catheter 10 according to an embodimen...

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Abstract

A dual-layer dilatation balloon includes an inner layer that includes a polymer selected from the group consisting of a polyester, polyether, polyamide and copolymers thereof, and an outer layer that includes a polyamide. The dual-layer balloon optionally further includes a stent disposed on the balloon. The stent is optionally a drug-eluting stent. A process for forming a dual-layer dilatation balloon includes forming a dual-layer extrudate having an outer layer that includes a polyamide and an inner layer that includes a polymer selected from the group consisting of a polyester, polyether, polyamide and copolymers thereof. The process also includes forming the dual-layer balloon from the dual-layer extrudate in a balloon forming machine, wherein the balloon has a hoop strength of about 10,000 to about 60,000 p.s.i.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of priority from U.S. Provisional Patent Application No. 60 / 751,255, which was filed on Dec. 16, 2005 and is currently pending, the entire content of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to the field of balloon dilatation. Specifically, the present invention relates to balloons for dilatation applications and a process for manufacturing the balloons. [0004] 2. Related Art [0005] Angioplasty balloons are currently produced by a combination of extrusion and stretch blow molding. The extrusion process is used to produce the balloon tubing, which essentially serves as a pre-form. This tubing is subsequently transferred to a stretch blow-molding machine capable of axially elongating the extruded tubing. U.S. Pat. No. 6,328,710 B1 to Wang et al. discloses such a process, in which a tubular preform is extru...

Claims

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Application Information

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IPC IPC(8): A61M29/00A61M31/00A61M37/00
CPCA61F2/958A61L29/06A61M25/1029A61M29/02A61M2025/1075C08L77/00
Inventor DESHMUKH, SUSHEELGODAIRE, RAYMOND
Owner MEDTRONIC VASCULAR INC
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